I'm a new chicken mom as of May, up until about a month or so ago all my chicks were small enough that they didn't leave the coop, now they "escape" daily. They either jump from the top of their run or they hop/fly over their fence. The fence is 4 ft. tall, chicken wire. We would like to cover the run to keep them from escaping, especially since now one of my Rhode Island Reds was killed today Can nets be used? Cover with more chicken wire? I want to avoid any more senseless deaths. I think it was a cat that got her.